Bolster with lateral-motion mountings



Aug. 5, 1930. T. H. sYMlNG-roN El' AL 1,772,323

' BOLSTER WITH LATERAL MOTION MOUNTINGS l Original).A Filed` April 9, 1926 Patented Aug. 5,1930,

titans' UNITED? STATES THOMAS sYiviiivGToN AND r'nncn. nnii'nivifivs, oFnALTiiviomi, MARYLAND, As-

.iATENr OFFICE N f siennes To T. ii. svirine'rona son, :No.on BALTIMOREQ'MARYLAND, A CORPO- narici;` er 'MARYLAND ioLsTEn WITH LATnniin-ifiorioiv MouNTiNes Original application filed AprilB, 1326,

rihe invention relatestobolsters foriailway cail trucks andis a division of ourf co'-V means thereon cooperating with side bearing elements depending from abody bolster for sustaining the load, insteadof the load loeing permitted toicome upon a center bearing and center plate as is the usual practice, the

arrangement being such that thetruck and body bolsters maytogether movewith respect to thetruck side frames so as'v to obtain the` beneiits recognized vinthe art as resulting from such a construction.

Another object of theinvention is toprovide atruck bolsterl and lateral motiony permitting means therefor located 'above the bolst-ersupporting springs which are mounted Within the window-openings of the truck side frameathe lateral motion device being of such nature as to exert a lifting action upon the truck bolsterwhen lateral motion thereof occurs, there being consequently-a natural tendency for the truck bolster to remain in itsfnormal positionand to return to such normal or neutral position subsequent to lateral motion. e Y

A further object of theinvention is to provide .a ytruck bolster with, peculiarly constructed and arranged as well as mounted side bearings which cooperate with ldepending bearing elements on thebody bolster for sus-k taining the load and permitting relative swivelling movement vof the truck and body holsters, both bolsteis being, however, so related thatthey move together in a longitudinal direction or laterally with respect to the truck when the car travels over curved track, switches, etc. i

A still further object is to provide a construction of this character in which the load Y Serial 110.1003948. Divided and'this application filed Augustv25,

`1,9727. serial No; 315,376.

sustaining side bearings carried by the truck l bolster ,may be spring supported, the springs acting in conjunction WiththetruOk springs foi'-i1icreasing`the spring capacity and preventing overloading, 'theperiod of oscillation ofthe two sets of springs being different so as to break up synchronization and reduce,ifnot eliminate, any tendencyof the car to develop roll or sidesway, the usual jiggler being also eliminated. v v

A still further object of the invention is to provide abolster and `lateral motion mount-- ing s therefor, the latterI being located outwardlyofthe side bearing structures and embodying rollers interposed between the` rbolster,ertensions'wliich operate within the f sideframhes and spring plates or followers engaging directly or indirectly upon the truck springs, an advantage being that the lateralV `motion mounting is independent of the side bearing structure and so positioned that the principal strains will come upon the truck holsters close to the points or areas which are generallysupported, bending moments beingcoiisequently reduced, thus making it possible'to employ a lighter construction than would otherwisebe possible.

An additional Objectis to provide a truck bolster of this character and mounting therefor which maybe used to replace a standard bolster withoutit being necessary7 to make any alterations or modifications in the re# niainder of the truck, the entire assembly consisting ofthe truck bolsterequippediwith the side bearings, the lateral motion rollers and the spring plate cooperating therewithall of these parts beingsimple and inexpensive "to manufacture and easy to assemble andinstall. With the foregoing and other Objects and advantages in view such as durability, etliciency and the general improvement ofthe art, the invention preferably consistsin the detailed construction and the arrangement and'combination of partsto be hereinafter more fully described and claimed,v and illustrated in the accompanying drawing in which:

. Figure l is a vertical sectional view taken longitudinally through oneend of abolster and its mounting` constructed in accordance with our invention, and

Figure 2 is a similar View showing a slight modification.

Referring:A more particularly to the drawing, the numeral 1 designates a portion of A with a pocket 6 defined between walls 7 which extend ytransversely of' the bolster. The pocket may be ofany desired depth, dependingfupon the exact nature ofthe elements to Ybe'mounted thereinas will be explained.

. The lengthandwidth ofthe pocket are also matters Wliichniay be-varie'd within considerable limits. In most respects the general construction .of they bolster 3.' may resemble thoseof-4 conventionalpattern, each end having a reduced extension 8 operating within thewindow/ opening: 2 forv cooperation with the supporting springsg. In so far as sup; porting; Webs, ribsV and other detailsare c'oncerned-, it-is apparent that ina-ny modificationsmaybe resorted-'to in the construction of' the bolster,v the' only requisite being that the structure be sufficiently ri id. to Ameet the requirements of the particu ar. service to which the bolsteris tobe; put, that' is to say depending,I upon the character, weight and capacity ofthe car in which ther bolster vis to 'be used.

. Locat'edwithinveach pocket is a supporting member 9l having a preferably inclinedr y upper surface 10 upon which is mounted a roller 11' adaptedfto move in anarcuate path transversely of the.' bolster and along the pocket as relative swivelling, movement rvof the truck and body bolsters occurs. The

.I roller preferably projects slightly above the top of the bolster rand engaging upon it: is a bearing member 12 formed with a'recessl receivingthe depending side bearing el'ement 14 which projects from the un'dersi-deof the body bolsterfl. The body bolster and side bearing element thereon are not lshown in detail inasmuch as they do not form any part ofthe present invention, their illustration being necessarvonly for the purpose of disclosing thee combination. It is intended that the load besustained entirely by the side bearings, for which reason the body4 bolster represented as. having its usual center plate 17V guidably received within a flange 18' on the top ofthe truck bolster at the center thereof, the. bottom` ofV thecenterf plate being spaced 'slightly above the top of the bolster to provide clearance. The--solefunction ofthe elements 17 and 18is to permit relative swivelling movement 'of Ithe truck and body bolsters While preventinfr relative longitudinal movement thereof, it eing 1ntended that the truck and body bolsters move as aunit when lateral motion occurs. Clearly, any other construction of an equivalent nature might be provided for maintaining the bearing member 12 in operative relation to the -body bolster so as to move therewith when relative swivelling'movement of the bolsters occurs. Inasrnuch as the path of the members 12 is arcuate when relative swivelling movement of the holsters occurs, the rollers 11 aretapered or frusto-conical in shape so as to travel in accordance with this path. Accordingly the undersurfacel of each bearing member 12 is linclined oppositely to the inclination of the top surface 10 of each of the supporting members 9.

The elements 9,11 and 12 above described may be sol-id in theirl relation as disclosedin Fgure 2f if desired,-but in Figure 1 we have illustratedy an important additional feature, and thatisa bank or group of'plate or leaf springs 19 located Within each pocket 6 beneath the supporting member 9 therein. wWhile leaf springs are specified it is conceivable that a different variety might be used ifi found preferable, the purpose being to support the load yieldingly so `that hammer-like impacts will not come. upon rthe members. 12 and beV transmitted thereby to the rollers and supporting members therefor vor tothe pocketsthemselves.f `These springs will clearly operate to absorb shocks and jars and to maintain a. close contact between the members 12 and the depending side bearing elements 14: carried by the bodybolster.

However, in both forms of the invention we provide lateral motion-means here disclosed as comprising 'seat'meinbers 2O which may be formed,V as spring caps engaged upon the springs? 5y and retained against movement in a horizontal? direction byany suitable means whatsoever. Rollers 21 are located between the reduced end 8 of the bolster and the seat member 20A. In the present instance two of such rollers-y are. shown at each endof the bolster though it shouldfbe understood that as many or as few may be employed as desired. It will of course be apparent that when ,the car rounds a curve the body and truclLbolsters together may move laterally of the truck, the reduced extensions 8 at the ends of the truck bolster sliding with respect to the side frames and rolling upon the rollers 21. It is highly desirable and in fact neeessary to provide some means for holding `the assembled bolsters in normal or neutral position with respect to the side frame and to returnV them to such` position after lateral motion has occurred. Accordingly, We provide the underside of each extension 8 with concavities defining curved surfaces 22 engaged by the rollers and also form each seat member 20 with a corresponding number of lill) oppositely curved surfaces 23 so tliatgwheii Y lateral motion of the assembled bolsters occurs a lifting action will result so that upon the cessation of the force tending to produce the lateral motion gravity will act to restore the partsto their normal or initial position. The exact curvature of the surfaces 22 and 23 may of course be varied to meet different conditions which may exist orxwhatever may be found most satisfactory as the result n0factual experiment. i

In that form of-theinvention disclosed in.

Figurel wherein the springs 19 are provided beneaththe side bearings, it is intended that thesprings have a different' period ofoscillation from the truck springs so as tobreak n p synchronization and therebyreduce, if not eliminate, any tendency of the car tofdevelop a roll or side sway. Furthermore, the spring capacity of the truck is increased so that there will be less likelihood of. overloading and less strain upon the parts. Inasmuch as the load comes upon the side bearings instead of a center bearing and as the side bearings are located near thetruclr side frames, it is apparent that bending moments in the bolster will be reduced, making it possible to employ ay bolster of lighter construction and weight than could be used in the standard or conventional design. Furthermore, the location of the lateral motion rollers directly at the side frames is Vof benefit inasmuchas the load thereon is transmitted in a practically vertical direction immediately to the `side i frames. In fact practically every detail necessary to the development of a greatly improved constrnctionhas been foreseen and provided for. It is really believed that the construction, operation and advantages will be readily apparent to one skilled in the art without further explanation.

lVhile we havey shown and described the preferred embodiment of the invention it should be Vunderstood that the disclosure is merely an exemplificatioii of the principles involved and that the right is reserved to make all such modifications or variations as will not depart from the spirit o-f the invention or the scope of the claims hereunto appended.

Having thus described the invention, we claim:

l. In a railway car trucl; bolster, a pocket structure at each end thereof, supporting members located within the pockets and eachk supporting a roller movable transversely of the bolster, means engaging the roller adapted for cooperation with a depending side bearing element on a body bolster, and lateral motion rollers located outwardly of the pockets and beneath the ends of the truck bolster. i 'f 2. ln a railway car truck bolster, a pocket structure at each end thereof, supporting members located within the pockets, rollers withinthe pockets `movable on said supports `ing members, means engaging `the, :rollers adapted for `cooperation With depending side bearing elements on abodyy bolster, lateral motion rollers mounted beneath the `end portions ofthe truck bolster outwardly of said pocket structures, and` means coaeting with saidlateral motion rollers `for normal ly maintaining the truck and `body holsters u together in centered relation tothe truck. g

Y 3. ln a railway car truck bolster, a pocket structure at each end thereof, supporting nieniberslocated within the pockets, rollers within `the pockets movable on said supporting members, means engaging .the rollers adapted for cooperation with depending'. side bearing elements o-n a body bolster,` lateral motion rollers mounted beneath the end portions of the truck `bolster outward'lyzoffsaid'.y pocket struc-tures, and means co-actingiwitlr, I

said lateral :motion rollers for normally maintaining the truck and body ,bolsters together in lcentered relation to,y the truckand restoring'the same to normal central position upon the cessation ofa forcetending to producelateral motion. i 1 a. AIn a railwaywcar truck, side frames, truck` springs mounted therein, atruck bolster having end portions verticallymovable within `the side frames and slidable laterally f. thereof, apoclret structure Within each end' portion ,of the bolster, side bearing means 1ocated withinthe pockets and cooperating with y depending side earingelements on a bod)7 bolster: for supportingrthe load, seat inembers engaged upon the "springs, and lateral motion rollers interposed between said. seat members and the undersurfacesof the` ends of the truck bolster. i 'i '4 truck springs mountedftherein, atruck bolster having end portions vertically movable vwithin theA side frames and slidable laterally thereof, a pocket structurey Within each end portion of the bolster, side bearing meanslocated Within the pockets and cooperating with depending side bearing elementsvon a body bolster forvsupporting the load, seatmembers engaged `upon thesprings, and lateral motion rollers interposed between said seat'members and the undersurfaces ofthe ends of `t-he truck bolster, each seat member being formed-at its topvvith curved surfaces end .portion ofthe bolster, sidebearing means 5. In a railwayl car-truck, side'frames, i

lo'eaftedf withiny the pockets and cooperating with depending side bearing elements on a bolster' for supporting the load, seat members engagedu-pon' the springs, and lateral motion'rollers interposed between said seatY members and the? under-surfaces ot the yends,ofthe-truck bolster, eachl seat member being formed at its Vtop with curved surfaeesengaged by the rollers, and Vthe bottorri-of ea-'eh end of the bolster havingoppo- Sit'elycurved surfaces engaged by the rollers whereby a liftingleflect will be obtained upon the occurrence of lateral motion of the asse'r'nbledv bolsters with respect to the side frames, and other springs located beneath they side bearings and yieldably supporting thesame.v `7. In a railway car truck, side frames, trueltl springs mounted therein, a truck bolster` having end .portions vertically movable with-intheside frames and slidab'le laterally th'el'eotQa pocket structure within each end portion of the` bolster, side bearing ymeans located* within the pockets and cooperating with depending' side bearing elements on a body bolster for supporting the load, seat .members engaged upon the springs, and lateral motion rollers' interposed `between said seat-membeis. and the-'undersurfaces ofthe endsaofl the trucl'bolster, each -seat member being-iformedat its top with curved surfaces engaged` by the, rol-Iers, and the bottom of eaeh end'l of'V the' bolster'. havingoppositely curved surtaeesfengaged -byf the rollers whereby ai lifting? eftect 'willl be obtainedv upon the occurrenceorf'lateral motion of the assembled belst'erswith re'spef'ctv tothe vsidev vframes, and other springs located beneath the side bea'rf ings and yieldably supporting the same, the second namedA springs` having a different periodioioseillation iomi the' truck springs forlbrefakiiigf up synchronization.'

8; In? a'rail'v'vay-ear truck, side frames, a truck bolster: h'avingi itsy endsmounted for vertical movementwithin'the sider frames and *movable laterally with respect to the side frames, a-pooket structurewithin each end of the bolster, a'fsupportingmember within the pocket, a tapered'roller movable on said sup- 'porting member, a' member engaged upon the rollen and? formed to receive adepending side :bearing elementI on-a bodvl bolster wherey,by the truck'and'body holsters may have relative swivellingr movement but yet `re'- strainedifrom: relative: longitudinal movement, a'seat member within eachy side frame, truelrr springs 'located 'withinthe side frames beneathk saiolseatmembers, and lateral motion yrollersf inten-posed between the4 seat smembers and theiendi portions of the bolster outwardly7 of the' poeketstherein. 1

9.21m a railway cartruclr, side' frames, a truck bolsterfhaving its ends mounted for'vertical mvementwithin the side frames and movable. laterally with respect to the side frames, a pocket structure Within-each end of the bolster, a supporting member Within tlhe pocket, a taperedv roller movable on said sup` porting member, a member engaged upon the roller and formed to receive a depending side bearing element on a body bolster whereby the truck and body bolster-s may haverelative swivelling movement but/yet restrained from' relative longitudinal movement, a seat-'member Within each side frame, Vtruck springs located Within therslde frames beneath Vsaid seat members, lateral motion rollers interposedbetween the seat members and the end portions of the bolster outwardly of the pockets therein, and a bank of plate springs within each pocket beneath the supporting member therein.

In testimony whereof we aix our signatures,

THOMAS H. SYMINGTON. PERCY R. DRENNING;

leo 

